The fuel tanks of modern military aircraft are designed as integral fuel tanks. The design features and sealing systems which were adopted for integral fuselage fuel tanks, to satisfy the requirement for tightness during the entire service life, are presented. The design aim was to minimize penetrations into the fuel compartments and to reduce the probability of fuel leaks by the application of redundant sealing barriers. The adopted sealing systems for the sealing of internal metallic substructure, and to an outer CFRP skin are described. Selected sealing systems were tested in a representative sideskin test box in fatigue and the experience gained was introduced into the design of a fuselage sealing box to aircraft standard which was also tested in fatigue. The representative fuel tank structure of the sealing box was used to demonstrate accessability for repair and to proof that repair actions to the sealing system are possible with suitable equipment.
Design Philosophy and Construction Techniques for Integral Fuselage Fuel Tanks
1989
20 pages
Report
Keine Angabe
Englisch
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